CA521856A - Telephone systems - Google Patents

Telephone systems

Info

Publication number
CA521856A
CA521856A CA521856A CA521856DA CA521856A CA 521856 A CA521856 A CA 521856A CA 521856 A CA521856 A CA 521856A CA 521856D A CA521856D A CA 521856DA CA 521856 A CA521856 A CA 521856A
Authority
CA
Canada
Prior art keywords
telephone systems
telephone
systems
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA521856A
Other languages
French (fr)
Inventor
A. Stallworthy Frank
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Brothers and Co Ltd
Original Assignee
Siemens Brothers and Co Ltd
Publication date
Application granted granted Critical
Publication of CA521856A publication Critical patent/CA521856A/en
Expired legal-status Critical Current

Links

CA521856A Telephone systems Expired CA521856A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA521856T

Publications (1)

Publication Number Publication Date
CA521856A true CA521856A (en) 1956-02-14

Family

ID=35675083

Family Applications (1)

Application Number Title Priority Date Filing Date
CA521856A Expired CA521856A (en) Telephone systems

Country Status (1)

Country Link
CA (1) CA521856A (en)

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